Separator



INVENTOR- T/ ORNEY SEPARATOR Filed Feb. 15a.y 1925 T NMM r y. A .f .H AN. MN .1w MN) .WN f \N. MW mi WN o m1 o bmw. o RMN um O O u.. NMN o mwN mm. ww @www NW ma M mm 19, Rm. o Gm, MM., WN um. mm mm.. hh @N who am MSN. @N

Dec. 21 1926.

. A iii siren' STATES Patented Dec. 21, 1926'.

i innata; v

Para y fr easier.

THOMAS r. srun'rnvaivnor WELLESLEY, MASSACHUSETTS, Assreikion'ro sfrnirrisi-g vANT MILL COMPANY, or BOSTON, MAssACHUsETTs aconronarrfon yor MAssA- oHUsETTs.

SEPARATOR.

lApplication filed February 19, i925. SerialNo 10163.".

The invention to'be hereinafter described relates to separators for grading materials;

Y One of the purposes of the invention'is provide simple Vandrefcient means for vi-I bi'ating and tensioning'a screen.V vTo accomplishV this, in thepresent instance, the screen y, is suspended between an eccentric vibrating l mechanism and springA means. VThe eccentric preferably hassliglit eccentricityand is j rotated at high speed.` `Yfl`he construction is suchV that the eccentric moves the screen iii eccentric thereto,"so thatvlost motion is elimihated and Wear is further reduced. Tiieeccentricand the spring, means desirably cooperate 'in imparting reciprocatory move-V l ments to vthe screen with high frequency.

. 1 The screen maybe in the form of `Woven screen clothing having opposed edges 'secured` to spreader bars or members. The eccentric mechanism maybe connected to one of .saidl ineinbersand the spring meansinay be connected to the other-member, the, construction being` such that the spring means will ten-` sion the screen clothing',` a nd maintain the same in taut condition. Y f

These separators usually operatewin dusty atmosphere, and therefore it is important thatthe eccentric mechanismV shallbe protected. v Anotherpurpose ofthe invention is to provide effective meansV for preventing dust from'reachingithe bearings and other oar s o ie ec en ric ine Ln` aiv t i t fti c t y cha ism, id a* the V,saine tiineprovide for .the necessary lubrication thereof;V

VV ith the aforesaid and other purposes in vievvythexcharacterfof the-inventionfmay be beit funderstoodrby reference to the follow-Al ing description of an illustrative'embodiment of the invention'shovvn in the drawings, wherein: Y

F'g. l isa vplan ofa separator embodying the invention;

VFig. 2 is ay vertical section taken on `line accompanying Fig. 3 is a perspective view ofan end por A' tion of the screen; v

6--6- of Fig.- 4;

Y Fig. Y4 is va Vvertical section on 'an enlarged l scale through the eccentric mechanism;

Fig.'5 is a vertical transverse section taken Fig. 6 is a sectional detail taken on line p Figs. -7and8 are re a side'elevatio'n ofV a pair of screens and connect'ions therefor, and

Fig. 91s adetail shown therein as an Villustrative embodimentv` lofthe invention,;fn`iayi have a suitable support, in the present instance, 'in theformof a frame comprising side-channels l j(l`i g`s.A 1 and2)}connected bylend channels and 5 adjacentopposite ends Vof the side chan-I nels.V To contribute Vto the stiffnessof thev frame, the side channels may lie-connected by angle bars' and 9. Secured to the end channel 3 is an angle bar 11 having arpaii-y l of lears 13 depending therefrom and con-i nected by a shaft 15 kWith'apair Iof feet 1'?. The ears constitute afroclrer .enablingy the Spectively a` plan' and4 l angle ofthefrarne to be varied vasfinore fullyY hereinafter described, At the opposite end of the frame from the 'rocker and securedrv to the side channels lare a" pair of eyes 19` through Which extend `a pair of threaded posts 21 having heads mounted` on feet 23. Nuts 25 are threadedonthe posts at oppo-Y site sides ofthe eyes 19. The construction .is such that the nuts may be adjusted thereby to rock the yframe on the shaft 15'tov dif-lY ferent elevations to give the frame the ,degrecy of inclinati-on desired. Theheads of the threaded postshavev curved slots therein,v

,cooperating with Y,the lfeet 23 to `allow ,rock-Y 'ing'of 'the posts on the ffeet. The frame' may he adjustedso4 that itinclines down Y Ward or upward toward the right of Fig. 2. f y Supported onrtlie'fraine is a screen, in thepresent instance, comprising woven Wire screen clothingQY having opposite edge lportions thereof entered between Vand secured to pairs of bars orl members 29 and 31. The bars have upstanding end portions 33 and 35, and the clothing has upstanding sideportions Sterininating in selvage'. edges 39 said opstanding side portions of the clothing servingto prevent materials from escaping over the edges of, the screen. i

loll

The bars .29 at one end oi the screen are connected to ends of rods 41 Which extend p through holes in the end channel 3 of the Vio andcoinprises casing' 49. (Figs. 1,2, @and secured to said channel by bolts 51. 1The casing'is tor'medo'ji' a. lower'part 53 and an 171 is provided with 'a lu'l iicating necir .and 71 confined 'against axial moty ings.

upper part which aresecui'cd together by bolts 5T.' Gn'e'sitle o. 1ie'casiieiias an' onen- .ing Which'is normally closed by a door 59 pivoted on 'ascitesY bolt (51,'s`aid door being provided with a handle G3. Thisdooi may be'freadily swung about the screwvr bolt 61 to open the saine, 'and Vwill naturally gra/'vitate `togand remain in its closedpvosition. Y

kit opposite ends ot the'cas'ing arejapen bones69 p Y ement doW-elpins 73. .e liiiounted rin 'theseboxesare Timlten yroll-ei =bemin -eaclincnnprisingv an outer raceway "75, Ian inner ioceW i' and rollers 79. VTheii'iner racevvays arel mounted fast on ythe reduced ends oiithe shaft 81 which Lis eftended beyond' one en i of `the tures and GT adapted to rece:

casing`r Where it receives 'a pulleyv adapt-et Yto beY belted toV any "conve-nient source oi power. rThe box 69 has'fa boss 85 proiecting,`

" therefrom groove'dftoireceive suitable paching,l 87. llfhe inner sides oi the Jboxes are closed by rings S9' apertured to vreceive the shaft; and secured in the boxes by 'set screws 91. AThese rings "arejgroovedyto receivesuit ablev packing` 93. Theouter side of the boi; 71' is closed by a cover 95 having' aflange 9T i''oi engagen'ieiit i 1li-the' outeiI Ira'cerva'v 75 o'isaid box. AScrew bolts v99 Vare enteredinto the cover and' the box, and enable Aadjustnientftheieoi to' take-up' any nfear between thei'ollers and rac `Ways oi theTinilenfbear- Til-ese bearl a be lubricated b3' the Well lrnown'iilemite system. To permit tliis,'tlie boi: 69 is provided Awith Va lubricating neck 101, andthel cover irthe bor; 103.

Mounted on' the shaft 81 Vb-etvffeen the boxes 69 land 'ZZ-Lis an eccentrc sleevelO, and encircling; said sleeve are a ci" ri 10T which are eccentric in Atorni so'vl a' posed with respect to' the sleevees to counpacking 117 and 119. The 'cover has a flange 121 which is threaded to the body ot the box,`

`and forming one side circumferential groove 129 to be referred to. Y

Mounted the box 111 area pair ot' Timlen roller bearings, each comprising outerrac-ewysili fitted into the box, inner racenfaysvl-B on the eccentric sleeve, and rollers A'1 between' the outer and inner race- Ways. A circuniiereiitialiiange13? projects outward iironi'fthe eccentric sleeve,- and is engaged byv adjacentends of tl'ie.,innei"'aoe ways, ai l therebyholdsthe'saine iiiprol r spaced rel on. The Tiinien bearings fin they box may beV Vlii'biiic'ated bythe ile'mite cant' conducting necks v1379 for tl-iis'j'piirpose. .Si strap 1111 partially embraces'the groove ei-ri'ed toon the boi; 111, andthepor- 143y (Fie. y5) in converging relation, the, ends o 'lv aidf strep, tend throi'ifgh openings i system, said borgy being providedivith lubri-Y parent that the screen'is' sii'spended between f the eccentric mechanism 'and' the"r springs. To contribute to the support'oi the A"screen,

pairs oi' rollers 151'and`153`maybe mounted` ico on shafts 155 and 157 secured in'the`side'Y channels'otfthe iranidsaid rollers being located beneath th'e'endtbar's 33 Land 35. n An inclined plate`159 may bev secured to the end bars 33, and serve to guide inaterialsiiorvng from the screen. Materials may be guided to the screen by-'a chute 161 (F moi'i'nted on uprights 163 and 165 carried 'by the frame. l

The eccentric preferably has'slight' eccentricity, and is rotatedV at high speer. Since the eccentric strap 141 onlyvpartially Yeinbraces theeccentric boX'111, the eccentric "ill shittthe strap and the screen' connected thereto intermittent-ly toward the left (Figs.

1. and 2 and the sorinos 43 Will ooerate 7 i U .l

through the rods 1l-1 intermittently to shift the screen toward the right oisaid ig'ures. ri`he springs are adjusted so that they Will maintain the screen clothing vin properr stretched condition. Sincenthejeccentric is not called upon to perform thework oislialring` the screen 'in opposite directions, the Wear thereon isV reduced, 'and 'since the springs-always tondi' to draw' the strap in one direction, there is no lost motion between the parts oi the eccentric vmechanism,"and the Wear thereon is 'further reduced.

ihe eccentric and-itsstrapat one endet the screen, and the springsv and their'rods' cooperate inf shaking the fscreeni but also ,-to i support the `sa1ne.- lUnder certain conditions centric shaft- '81 land the journal.boxesaref` placed in the. lower part .,53 .ofthe casing 49% e insp'roperregistration withV the dowelpins ,r

1"? 73. -Thenith'e-.upper part'of the ,casing is.

mountedlonandbolted to therlovver pfartf` n Y Y c Y Y .may be made ltl'ierefromly Witghoutdepartingg f from ,the .Spirit S21-11d SGOPGO' thefappndedt The 'boXesrmay' betil-led With'greasejto 'si Vinsure proper .protectionl of. .the V"'fimkenj roller bearings. ilVear on the `bearings/of: the journal boxes 69 and`71'1-rna'yj be taken:- Y up byadjustment of they cover 95,'oftli'e--boXz 71` and Wear on vthe bearings in the; eccentricaA` box may be taken upby adjustment offthe the 'rollers' l151 and1153 may be relie'dupon` to contribute to the support of thescreen.-

The angle oflthe 'screen'. inaybevaried by adjustment ,of the nuts'Q :alongf the threaded posts. If thean'gleof thev screen is slight-,f a 'substantial mass of materialbeing graded may sta-ndV onf and-'besupported by the." rlchis may dea'den `vibration of the screen. screenv transversely to the planethereof74 but itfwill lnot interfere with thevibrationof-f theA screen inthe direction ofthe'plane'thereof since the eccentric 'and springs operate .f

positivelytod reciprocate the screen; vIn a nal vibrations'.

The Vparts of the eccentric mechanism be easilyand quicklyassembled.U1 Toaccom-, plish this the -journalboxes 69 and?? 1 and the' eccentric'boxlll are nn'ounted onzthe ec-.v

the casing. v .l 4Thevjournalv boxesifare'fclosed jand priov-tected from ingress offdustl therein.A 'lhe. eccentric-*box is .closed andA 1.protects',`: the .ec-'L centricandv parts associated: therewith.; fronti;A

ingre'ssaof'dnst. Also-further.protectionis' Y iV slight eccentricity, spring ineens, and screen clothing between andvconnected to` the ec? Vcentric and spring means, said'screen cloth- ,ing being Amaintained inA taut conditionby.`

had-.by theclosed.casingV 49@ l.

coverV 115 of .said box. In Figs. 7 'andS are shown 'en -upper'.or

suitably secured to the opposite Yend hars 'lof the screens and adapted .to4 be connectedto, the spring` rodslireferred'to.; The ec`cen-Y tric and'springs will'cooperate to shalerthe; pair of-screens VWith'min'ute amplitude and high. frequency .of `reciproca-tions already described 1n respect to'the .single screen.

The links 173, ingthegpresent instance are,V connected to the stirrups 41721-at points#whichl are intermediate the' upperA and" lowerends of the stirrups l and the planes -of Vthe screens,`v andthe rods1141 arev connected to the stir# screens.

l. Under ycertain conditions it` may V:bei r rups 175- ati vpoints intermediate? the i uterf ends 'oflthe sti-rrups andfth'e planes :of/the The construction is such thatlthef sirablethat'l the.` screen shall receive vibration positively `transversely 'to the; planeV thereof. To4 accomplish this ldevices may Ibe i substitutedjfor.the rollers 151' .anvd`153 re-V fer'red tor inthe present .instance` ,eachrof these devices kcomprises a vlink ori toggle-.1772 (Figs. 8 and9) having. eyes` at oppositeends Y thereof connectedby pins'f179 with brackets f." 181 and183,.,onesecured to an end bariofthe screen and the other securedto one of the;

frame anglebars beneaththescreen.- These toggl'es may .stand in oblique positionswhen .f Y the screen is{shifted-fitogtheright Vby'fthe ,i

springsffand vin erect :positions"Whenz ,the:. screenis shifted to the-left Aloythe;eccentric.f f

The rocking,y of. these ,togglesg causedbyfthe;

reciprocation of the screenby ,the-` eccentric and '.springs,V vwill,positively4 limpart'v togtl'ie i 1'90 thereof. lfhileftheetoggles aref shown ap?.

screenrvibration transversely-:t0 the'L plane stood theyinayzbe appl-iedto a,sin'gjlflescreen.VV` it will bezunderstood that, the'y in vention-l` 'is not limited to s the construction shown v 1in l the drawings and that vari'ous ndeviationsi` claims.

prising, vvrincombination, .'anf'eccentric of said eccentricand spring means, andsaid centric and spring-.means "2., rif-.separaten for grading 100 1. A separator'for .grading materialsfeonia pair of separateV bars` secured fto fr )ppose'dvfv edgesmof the screen clothingandan eccentric mj'echanisrnl and spring l,rneansz connected to -saidV bars,' said 1 eccentric l: mechanism vand` springv means, cooperating to vibratathe screen 'clothingl and pull said x bars in oppof site ldirectionsto kmaint-ain the screen cloth-.

insin taut condition,

`3. Aseparatorforlgradingmaterialsfcomlprising,fincombinatiomscreen clothingrhav-aL .Y ing opposed free gedges,fand1.nieans vfor stretching and vibra-ting {the screen "clothing".y inthe plane thereof including.V means for positively imparting movements tothe screen clothing. in one directionin said plane,V and spring ymeans for imparting'. movementsr to the screen'clothing in the opposite direction insaid plane,l said screen clothing being c'on-` 130 means, and means operable positively to vif brate the screen clothing transversely to the plane thereof when the screen clothinggis shaken in the direction of the plane thereof. l5. A separator for grading material,

comprising, in combination, a screen, an eccentric and spring means 'connected to opposite edges of the screen and cooperating to shake the screen in the plane thereof, said screen'being stretched by and between saideccentric andspring means, and means operated by sucli shaking of the screen for vibrating the latter transversely to the plane'I said screens and vfor vibrating said screens "f substantially in the directions of the planes thereof including an'u eccentric and spring mea-ns, yand'means connecting the eccentric' Yand-spring means to opposite ends of the l.screens,said connecting means having pi'ovision for proportioningthe tension onthe upper and lower screens.

l/A4 separator -for grading materials,"

comprising, in combination, upper and-lower 'unframed screens, means for tensioning and vibrating said screens including members connecting the upper and lower screens,

spring means connected'to one of said menibers, and an eccentric connected to the other member,- said spring means and eccentric lbeing connected to saidmenibers at points intermediate the planes of the screens, thereby to' proportion the tension on the upper THoMAs rs'rURTEvANT.

and lower 

